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Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2014 ; 5 (ä): 5827 Nephropedia Template TP
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Phosphorylation of LRRK2 by casein kinase 1? regulates trans-Golgi clustering via differential interaction with ARHGEF7 #MMPMID25500533
Nat Commun 2014[]; 5 (ä): 5827 PMID25500533show ga
LRRK2, a gene relevant to Parkinson's disease, encodes a scaffolding protein with both GTPase and kinase activities. LRRK2 protein is itself phosphorylated and therefore subject to regulation by cell signaling but the kinase(s) responsible for this event have not been definitively identified. Here, using an unbiased siRNA kinome screen, we identify and validate casein kinase 1? (CK1?) as being responsible for LRRK2 phosphorylation, including in the adult mouse striatum. We further show that LRRK2 recruitment to TGN46-positive Golgi-derived vesicles is modulated by constitutive LRRK2 phosphorylation by CK1?. These effects are mediated by differential protein interactions of LRRK2 with a guanine nucleotide exchange factor, ARHGEF7. These pathways are therefore likely involved in the physiological maintenance of the Golgi in cells, which may play a role in the pathogenesis of Parkinson's disease.